src/mesa/drivers/dri/i965/brw_binding_tables.c

   1 /*
   2  * Copyright © 2013 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 /**
  25  * \file brw_binding_tables.c
  26  *
  27  * State atoms which upload the "binding table" for each shader stage.
  28  *
  29  * Binding tables map a numeric "surface index" to the SURFACE_STATE structure
  30  * for a currently bound surface.  This allows SEND messages (such as sampler
  31  * or data port messages) to refer to a particular surface by number, rather
  32  * than by pointer.
  33  *
  34  * The binding table is stored as a (sparse) array of SURFACE_STATE entries;
  35  * surface indexes are simply indexes into the array.  The ordering of the
  36  * entries is entirely left up to software; see the SURF_INDEX_* macros in
  37  * brw_context.h to see our current layout.
  38  */
  39
  40 #include "main/mtypes.h"
  41
  42 #include "brw_context.h"
  43 #include "brw_defines.h"
  44 #include "brw_state.h"
  45 #include "intel_batchbuffer.h"
  46
  47 /**
  48  * Upload a shader stage's binding table as indirect state.
  49  *
  50  * This copies brw_stage_state::surf_offset[] into the indirect state section
  51  * of the batchbuffer (allocated by brw_state_batch()).
  52  */
  53 static void
  54 brw_upload_binding_table(struct brw_context *brw,
  55                          GLbitfield brw_new_binding_table,
  56                          struct brw_stage_state *stage_state)
  57 {
  58    /* CACHE_NEW_*_PROG */
  59    struct brw_stage_prog_data *prog_data = stage_state->prog_data;
  60
  61    /* If there are no surfaces, skip making the binding table altogether. */
  62    if (prog_data->binding_table.size_bytes == 0) {
  63       if (stage_state->bind_bo_offset != 0) {
  64          brw->state.dirty.brw |= brw_new_binding_table;
  65          stage_state->bind_bo_offset = 0;
  66       }
  67       return;
  68    }
  69
  70    if (INTEL_DEBUG & DEBUG_SHADER_TIME) {
  71       brw->vtbl.create_raw_surface(
  72          brw, brw->shader_time.bo, 0, brw->shader_time.bo->size,
  73          &stage_state->surf_offset[prog_data->binding_table.shader_time_start], true);
  74    }
  75
  76    uint32_t *bind = brw_state_batch(brw, AUB_TRACE_BINDING_TABLE,
  77                                     prog_data->binding_table.size_bytes, 32,
  78                                     &stage_state->bind_bo_offset);
  79
  80    /* BRW_NEW_SURFACES and BRW_NEW_*_CONSTBUF */
  81    memcpy(bind, stage_state->surf_offset, prog_data->binding_table.size_bytes);
  82
  83    brw->state.dirty.brw |= brw_new_binding_table;
  84 }
  85
  86 /**
  87  * State atoms which upload the binding table for a particular shader stage.
  88  *  @{
  89  */
  90
  91 /** Upload the VS binding table. */
  92 static void
  93 brw_vs_upload_binding_table(struct brw_context *brw)
  94 {
  95    brw_upload_binding_table(brw, BRW_NEW_VS_BINDING_TABLE, &brw->vs.base);
  96 }
  97
  98 const struct brw_tracked_state brw_vs_binding_table = {
  99    .dirty = {
 100       .mesa = 0,
 101       .brw = BRW_NEW_BATCH |
 102              BRW_NEW_VS_CONSTBUF |
 103              BRW_NEW_SURFACES,
 104       .cache = CACHE_NEW_VS_PROG
 105    },
 106    .emit = brw_vs_upload_binding_table,
 107 };
 108
 109
 110 /** Upload the PS binding table. */
 111 static void
 112 brw_upload_wm_binding_table(struct brw_context *brw)
 113 {
 114    brw_upload_binding_table(brw, BRW_NEW_PS_BINDING_TABLE, &brw->wm.base);
 115 }
 116
 117 const struct brw_tracked_state brw_wm_binding_table = {
 118    .dirty = {
 119       .mesa = 0,
 120       .brw = BRW_NEW_BATCH | BRW_NEW_SURFACES,
 121       .cache = CACHE_NEW_WM_PROG
 122    },
 123    .emit = brw_upload_wm_binding_table,
 124 };
 125
 126 /** Upload the GS binding table (if GS is active). */
 127 static void
 128 brw_gs_upload_binding_table(struct brw_context *brw)
 129 {
 130    /* If there's no GS, skip changing anything. */
 131    if (brw->geometry_program == NULL)
 132       return;
 133
 134    brw_upload_binding_table(brw, BRW_NEW_GS_BINDING_TABLE, &brw->gs.base);
 135 }
 136
 137 const struct brw_tracked_state brw_gs_binding_table = {
 138    .dirty = {
 139       .mesa = 0,
 140       .brw = BRW_NEW_BATCH |
 141              BRW_NEW_GS_CONSTBUF |
 142              BRW_NEW_SURFACES,
 143       .cache = CACHE_NEW_GS_PROG
 144    },
 145    .emit = brw_gs_upload_binding_table,
 146 };
 147
 148 /** @} */
 149
 150 /**
 151  * State atoms which emit 3DSTATE packets to update the binding table pointers.
 152  *  @{
 153  */
 154
 155 /**
 156  * (Gen4-5) Upload the binding table pointers for all shader stages.
 157  *
 158  * The binding table pointers are relative to the surface state base address,
 159  * which points at the batchbuffer containing the streamed batch state.
 160  */
 161 static void
 162 gen4_upload_binding_table_pointers(struct brw_context *brw)
 163 {
 164    BEGIN_BATCH(6);
 165    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 | (6 - 2));
 166    OUT_BATCH(brw->vs.base.bind_bo_offset);
 167    OUT_BATCH(0); /* gs */
 168    OUT_BATCH(0); /* clip */
 169    OUT_BATCH(0); /* sf */
 170    OUT_BATCH(brw->wm.base.bind_bo_offset);
 171    ADVANCE_BATCH();
 172 }
 173
 174 const struct brw_tracked_state brw_binding_table_pointers = {
 175    .dirty = {
 176       .mesa = 0,
 177       .brw = (BRW_NEW_BATCH |
 178               BRW_NEW_STATE_BASE_ADDRESS |
 179               BRW_NEW_VS_BINDING_TABLE |
 180               BRW_NEW_GS_BINDING_TABLE |
 181               BRW_NEW_PS_BINDING_TABLE),
 182       .cache = 0,
 183    },
 184    .emit = gen4_upload_binding_table_pointers,
 185 };
 186
 187 /**
 188  * (Sandybridge Only) Upload the binding table pointers for all shader stages.
 189  *
 190  * The binding table pointers are relative to the surface state base address,
 191  * which points at the batchbuffer containing the streamed batch state.
 192  */
 193 static void
 194 gen6_upload_binding_table_pointers(struct brw_context *brw)
 195 {
 196    BEGIN_BATCH(4);
 197    OUT_BATCH(_3DSTATE_BINDING_TABLE_POINTERS << 16 |
 198              GEN6_BINDING_TABLE_MODIFY_VS |
 199              GEN6_BINDING_TABLE_MODIFY_GS |
 200              GEN6_BINDING_TABLE_MODIFY_PS |
 201              (4 - 2));
 202    OUT_BATCH(brw->vs.base.bind_bo_offset); /* vs */
 203    OUT_BATCH(brw->ff_gs.bind_bo_offset); /* gs */
 204    OUT_BATCH(brw->wm.base.bind_bo_offset); /* wm/ps */
 205    ADVANCE_BATCH();
 206 }
 207
 208 const struct brw_tracked_state gen6_binding_table_pointers = {
 209    .dirty = {
 210       .mesa = 0,
 211       .brw = (BRW_NEW_BATCH |
 212               BRW_NEW_STATE_BASE_ADDRESS |
 213               BRW_NEW_VS_BINDING_TABLE |
 214               BRW_NEW_GS_BINDING_TABLE |
 215               BRW_NEW_PS_BINDING_TABLE),
 216       .cache = 0,
 217    },
 218    .emit = gen6_upload_binding_table_pointers,
 219 };
 220
 221 /* Gen7+ code lives in gen7_{vs,gs,wm}_state.c. */
 222
 223 /** @} */